Switch tabs by mouse wheel in the tab bar ON TABS ONLY

[chrisqoo]

Sorry but we can't reproduce this issue.
Have you tried running the browser in safe mode?

Yes. It's the same in Incognito Mode.

This function is working if the mouse pointer is hovering over the New tab button (the plus sign).
It will still work if I move 50 pixels to the right.
If I go further, the function stops.

I've also tried downgrade to v4.2.10.171, and this function works perfectly as intended.